Fastener



FIG. 1 is a top perspective view of the present fastener;

FIG. 2 is a front view of the fastener of FIG. 1;

FIG. 3 is a rear view of same;

FIG. 4 is a side view of the fastener of FIG. 1; both sides being mirror images of each other;

FIG. 5 is a top plan view of the fastener of FIG. 1; and,

FIG. 6 is a bottom plan view of same.

The broken lines in the drawings illustrate portions of the fastener and form no part of the claimed design. 

CLAIM The ornamental design for a fastener, as shown and described. 